Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/21324

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dc.contributor.authorHipolito, Fábio-
dc.contributor.authorChaves, A. J.-
dc.contributor.authorRibeiro, R. M.-
dc.contributor.authorVasilevskiy, Mikhail-
dc.contributor.authorPereira, Vitor M.-
dc.contributor.authorPeres, N. M. R.-
dc.date.accessioned2012-12-10T11:40:09Z-
dc.date.available2012-12-10T11:40:09Z-
dc.date.issued2012-09-19-
dc.date.submitted2011-12-01-
dc.identifier.citationPhysical Review B: Condensed Matter and Materials Physics, 86 (2012) 115430por
dc.identifier.issn1098-0121por
dc.identifier.urihttp://hdl.handle.net/1822/21324-
dc.description.abstractThe optical conductivity of graphene nanoribbons is analytical and exactly derived. It is shown that the absence of translational invariance along the transverse direction allows considerable intraband absorption in a narrow frequency window that varies with the ribbon width, and lies in the THz range domain for ribbons 10–100 nm wide. In this spectral region the absorption anisotropy can be as high as two orders of magnitude, which renders the medium strongly dichroic, and allows for a very high degree of polarization (up to ∼85%) with just a single layer of graphene. Using a cavity for impedance enhancement, or a stack of few layer nanoribbons, these values can reach almost 100%. This opens a potential prospect of employing graphene ribbon structures as efficient polarizers in the far IR and THz frequencies.por
dc.description.sponsorshipFundação para a Ciência e a Tecnologia (FCT) - PEst-C/FIS/UI0607/2011, UMINHO/BI/ 001/2010, NRF-CRP award “Novel 2Dmaterials with tailored properties:beyond graphene” (R-144-000-295-281, Singapore)por
dc.language.isoengpor
dc.publisherAmerican Physical Societypor
dc.relationPEst-C/FIS/UI0607/2011-
dc.rightsopenAccesspor
dc.subjectGraphenepor
dc.subjectNanoribbonpor
dc.subjectOptical conductivitypor
dc.subjectDichroismpor
dc.titleEnhanced optical dichroism of graphene nanoribbonspor
dc.typearticlepor
dc.peerreviewedyespor
dc.relation.publisherversionhttp://prb.aps.org/por
sdum.publicationstatuspublishedpor
oaire.citationStartPage115430-1por
oaire.citationEndPage115430-9por
oaire.citationIssue11por
oaire.citationTitlePhysical Review Bpor
oaire.citationVolume86por
dc.identifier.essn1550-235X-
dc.identifier.doi10.1103/PhysRevB.86.115430por
dc.subject.wosScience & Technologypor
sdum.journalPhysical Review B: Condensed Matter and Materials Physicspor
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

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